A number of my people on my friends list have been taking the Myers-Briggs test. Unsurprisingly, I come out as xNFP. I took the test here.
Some people might be a bit confused about me not coming up strongly on the extrovert end. Well, the introvert/extrovert scale also measures/describes how much internal vs. external processing you do.
I do lots of internal processing...
I like at least the beginnings of the descriptions of the two types from TypeLogic:
General: ENFPs are both "idea"-people and "people"-people, who see everyone and everything as part of an often bizarre cosmic whole. They want to both help (at least, their own definition of "help") and be liked and admired by other people, on bo th an individual and a humanitarian level. They are interested in new ideas on principle, but ultimately discard most of them for one reason or another.
INFPs never seem to lose their sense of wonder. One might say they see life through rose-colored glasses. It's as though they live at the edge of a looking-glass world where mundane objects come to life, where flora and fauna take on near-human qualities.
INFP children often exhibit this in a 'Calvin and Hobbes' fashion, switching from reality to fantasy and back again. With few exceptions, it is the NF child who readily develops imaginary playmates (as with Anne of Green Gables's "bookcase girlfriend"--her own reflection) and whose stuffed animals come to life like the Velveteen Rabbit and the Skin Horse.
In reading further in the descriptions involved, I don't think I have quite the flightiness of the ENFP. The INFP description does seem to fit pretty closely though.